answersLogoWhite

0

Carbohydrates enter the blood stream as glucose, which serves as a high-energy source of fuel so that your body can make it through the rigorous run. Carbohydrates are an essential part of the diets of distance runners because the glucose is absorbed in the liver and synthesized into glycogen (strands of glucose), which are used by runners during marathons as the primary energy source. The carbohydrate drinks help to maintain your energy level.

User Avatar

Wiki User

15y ago

What else can I help you with?